Question

Here are the ingredients for making pineapple sorbet for 6 people.

Answer 1

800/6=pineapple for one person.
133.3*9=1,200.
Hope this helps.
Answer is 1,200g pineapple

Answer 2

This is a ratio problem

6 / 800 = 9 / n  (can say as 6 is to 800g as 9 is to n grams)

6n = 800(9) --- by multiplying means and extremes 

n = 7200 / 6    divide by 6 to isolate n 

n = 1200g 

plug in to check 6 / 800 = 0.0075    9 / 1200 = 0.0075